Laser cutting - has colinear beam bundles with different focussing and rapid cyclic changes between the beams

摘要

To give laser working with dynamic focussing, using two colinear bundled beams with variable beam dias. or divergence, according to application the two bundled beams (12,13) are focussed (14) to give a striking zone (16) at the workpiece (17) with different characteristics for each of the beams. Each beam can have a different focus dia. or focussed point, or both. The material working process is a series of rapid working cycles, separated from each other. ADVANTAGE - Designed partic. for laser cutting of ferrous materials, using a CO2 high power laser, it gives a clean cutting action without slag build-up and can be used for working thick materials with very sensitive cutting parameters.